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Showing 1 to 20 of 123 for “"plasmons"”.
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Surface plasmons for enhanced metal-semiconductor-metal photodetectors
Surface Plasmon Polaritons (SPPs) are quantized charge density oscillations that occur when a photon couples to the free electron gas of the metal at the interface between a metal and a dielectric. The extraordinary properties of SPP allow for sub-diffraction limit waveguiding and localized field …
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Terahertz photomixing spectroscopy of two-dimensional semiconductor plasmons
… underlying the detectors photoresponse, namely plasmons. Although two-dimensional plasmons were first observed in semiconductors in 1978, to date, their physical properties, for example scattering and absorption cross section, are relatively unknown. The primary purpose of this work is to …
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Molecular Plasmonics: Graphene Plasmons in the Picoscale Limit
Doped graphene supports surface plasmons in the mid- to far-infrared that are both electrically and spatially tunable. Graphene has been shown to enable greater spatial confinement of the plasmon and fewer losses than typical noble metals. Reduced-dimensional graphene structures, including …
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Exploiting plasmons to sense interfacial changes at the nanoscale
Probing chemistry, especially at the nanoscale, provides insight into the mechanisms governing chemical reactions at interfaces and potential avenues for materials development. As a class of materials, plasmonic nanomaterials are a promising approach for probing chemistry at interfaces. When …
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Terahertz waveguide spectroscopy of two-dimensional plasmons in GaAs
… to study the low-temperature behavior of 2D plasmons.
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Guiding of plasmons and phonons in complex three dimensional structures
The demand for pathways to fabricate and methodologies to understand 3D structures with advanced functionalities has increased significantly over the last years. Materials exhibiting three-dimensional structure with characteristic length scales ranging from nanometers to micrometers have …
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Propagation, Scattering and Amplification of Surface Plasmons in Thin Silver Films
Plasmons, i.e. collective oscillations of conduction electrons, have a strong influence on the optical properties of metal micro- and nanostructures and are of great interest for novel photonic devices. Here, plasmons on metal-dielectric interfaces are investigated using near-field optical …
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Tunable Linear and Nonlinear Metasurfaces Based on Hybrid Gold-Graphene Plasmons
<p>Optical Metasurfaces are planar structures that are patterned with subwavelength structures and are very thin compared to the wavelength of light. Despite their thinness, these structured materials can strongly interact with incident light to effect the functionalities of conventional optical …
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Using 2D vortex plasmons/phonon polaritons to control electronic selection rules
… could be quantum dots interfaced with surface plasmons in-conventional metals.
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Phase-Coherent Drag of Plasmons in a 2D Flowing Fermi Liquid
Collective modes in electron fluids feature phase-coherent drag response under a background carrier flow, resembling the optical Fizeau drag of photons by a moving medium. Time reversal breaking due to Fermi surface polarization by the flow results in nonreciprocity: collective modes acquire a ±𝑘 …
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X-ray photoelectron spectroscopy: a study of plasmons, alloys and gold compounds
Contains fulltext : mmubn000001_025262491.pdf (Publisher’s version ) (Open Access)
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Manipulation of Light-Matter Interaction in Two-Dimensional Systems via Localized Surface Plasmons
Localized surface plasmons (LSPs), which are collective charge oscillation confined by metallic nanoparticles, gained much interest in the field of optoelectronics due to its ability to confine light down to nanoscale without a diffraction limit. As light-matter interaction in nanoscale is becoming …
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Plasmonic Nanostructures: Optical Nanocircuits, Tunable Charge Transfer Plasmons, and Properties of Fano Resonant Nanoclusters
… at the nanoscale via the excitation of surface plasmons, the collective oscillation of conduction band electrons. Surface plasmons can focus electromagnetic field into a subwavelength dimension and sense the change of the local dielectric environment, promising properties for surface enhanced …
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Part I. Excitons and Plasmons in Superconductors. Part Ii. Lifetime Effects in Condensed Fermion Systems
Made available in DSpace on 2015-05-12T17:12:26Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6202879.PDF: 2845643 bytes, checksum: 170b127938235f9095de0fca5c7b9c81 (MD5) Previous issue date: 1962
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Une biocapteur à base de résonance de plasmons de surface intégré monolithiquement avec une source d'excitation
… le phénomène optique appelé résonance par plasmons de surface. Ce projet de recherche vise l’étude de l’intégration monolithique des deux tiers des composants principaux qui conforment normalement à ce type de biocapteurs optiques. Tandis que d'autres projets de recherche ont centré …
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Dynamic polarizability and collective modes in narrow-band electron systems
… the frequency-momentum dispersion of surface plasmons and making it much stronger than that of the underlying narrow-band carriers. Strongly dispersing plasmons pierce through the particle-hole continuum and extend in the forbidden energy band above it. This behavior enables decoupling of …
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The plasmonics of a nanosphere on a mirror substrate
… When this occurs, both the localised surface plasmons on the particle and propagating surface plasmons at both of the interfaces of the substrate can be excited. The reflectivity and permittivity of the substrate plays a key role in the plasmonics of a NPoM. As reflectivity increases, a …
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Dynamic control of plasmonic resonances with graphene based nanostructures
… collective oscillations of electrons termed as plasmons. These plasmons are useful in control and manipulation of information in nanoscale dimensions and at high operating frequencies. Hence, the field of plasmonics opens up the possibility of developing nanoscale optoelectronic circuitry for …
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